两传动带轮的对应槽必须在同一平面内，其须斜角不超过（）
A、4°
B、7°
C、10°
D、15°
参考答案：C
The police recommended that the ________ in the accident ____________ to the hospital nearby at once.
A．injure; should be sent
B．injuring; send
C．injured; be sent
D．injured; should send
汽轮机真空急剧下降的原因是什么？如何进行处理？
